wifi: mac80211: remove NPCA during chandef downgrade

We can't use NPCA any more if the chandef was downgraded,
for obvious reasons. Clear NPCA during any downgrade.

Link: https://patch.msgid.link/20260428112708.2ab0e6f2e433.Ic39badb6782ef2242942424538f57e4a83391a06@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 00e46b5bc0201adaa1132eed754149aff2981a1e..24537794256c30e496f0f0f3428763564eaf26c8 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -3832,6 +3832,10 @@ again:
                c->width = new_primary_width;
        }
 
+       /* whatever we do, downgrading removes NPCA */
+       c->npca_chan = NULL;
+       c->npca_punctured = 0;
+
        /*
         * With an 80 MHz channel, we might have the puncturing in the primary
         * 40 Mhz channel, but that's not valid when downgraded to 40 MHz width.